FORCE AND LAWS OF MOTION
Galileo Galilei
Galileo Galilei(1564 – 1642) Galileo Galilei was born on 15 February 1564 in Pisa, Italy. Galileo, right from his childhood, had interest in mathematics and natural philosophy.But his father Vincenzo Galilei wanted him to become a medical doctor. Accordingly, Galileo enrolled himself for a medical degree at the University of Pisa in 1581 which he …
What is Newton’s First Law of Motion ?
“A body remains in the state of rest or uniform motion in a straight line unless and until an external force acts on it.“ According to Newton’s first law of motion, a body won’t begin to move unless and until an outside force acts on it. When something starts moving, it won’t stop or change …
A hammer having a mass of 1 kg going with a speed of 6 m/s hits a wall and comes to rest in 0.1 sec. Compute the obstacle force that makes the hammer stop.
Solution: Mass of Hammer, m = 1 kgInitial Velocity, u = 6 m/sFinal Velocity, v = 0 m/sTime Taken, t = 0.1 sThe acceleration is: a = (v – u )/t a = ( 0 m/s – 6 m/s ) / 0.1 sec Therefore, a = – 60 m/s2 [-ve sign means retardation]Thus, the retarding …
Anshal has a toy car mass of 2 kg. How much force should she apply to the car so that it should travel with the acceleration of 8 m/s2?
Solution: m (Mass of toy car) = 2 Kg,a (Acceleration) = 8m/s2,F is Force to be applied by Anshal = m × a = 2 Kg × 8 m/s2 = 16 Kgm/s2 = 16 N.
How much net force is required to accelerate a 1000 kg car at 4.00 m/s2?
Solution: Given, Acceleration (a) = 4.00 m/s2MAss (m) = 1000 kgTherefore, F = ma = 1000 × 4 = 4000 N
Force
The push or pull on an object with mass causes it to change its velocity. Force is an external agent capable of changing a body’s state of rest or motion. It has a magnitude and a direction. The direction towards which the force is applied is known as the direction of the force, and the …